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Physics · PYQ NEET UG 2024
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Physics · PYQ NEET UG 2024
The maximum elongation of a steel wire of 1 m length if the elastic limit of steel and its Young's modulus, respectively, are \( 8 \times 10^8 \text{ N m}^{-2} \) and \( 2 \times 10^{11} \text{ N m}^{-2} \), is :
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A logic circuit provides the output \( Y \) as per the following truth table : | A | B | Y | |---|---|---| | 0 | 0 | 1 | | 0 | 1 | 0 | | 1 | 0 | 1 | | 1 | 1 | 0 | The expression for the output \( Y \) is :
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In the above diagram, a strong bar magnet is moving towards solenoid-2 from solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions:
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The minimum energy required to launch a satellite of mass \( m \) from the surface of earth of mass \( M \) and radius \( R \) in a circular orbit at an altitude of \( 2R \) from the surface of the earth is:
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In a uniform magnetic field of \( 0.049 \text{ T} \), a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is \( 9.8 \times 10^{-6} \text{ kg m}^2 \). If the magnitude of magnetic moment of the needle is \( x \times 10^{-5} \text{ A m}^2 \); then the value of 'x' is :
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A \( 10\text{ }\mu\text{F} \) capacitor is connected to a \( 210\text{ V}, 50\text{ Hz} \) source as shown in figure. The peak current in the circuit is nearly (\( \pi = 3.14 \)):
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In the following circuit, the equivalent capacitance between terminal A and terminal B is :
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Given below are two statements: Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges. Statement II: Atoms of each element are stable and emit their characteristic spectrum. In the light of the above statements, choose the most appropriate answer from the options given below:
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If the mass of the bob in a simple pendulum is increased to thrice its original mass and its length is made half its original length, then the new time period of oscillation is \( \frac{x}{2} \) times its original time period. Then the value of \( x \) is:
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The quantities which have the same dimensions as those of solid angle are :
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A tightly wound 100 turns coil of radius \( 10\text{ cm} \) carries a current of \( 7\text{ A} \). The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as \( 4\pi \times 10^{-7} \) SI units):
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\( {}_{82}^{290}\text{X} \xrightarrow{\alpha} \text{Y} \xrightarrow{e^+} \text{Z} \xrightarrow{\beta^-} \text{P} \xrightarrow{e^-} \text{Q} \) In the nuclear emission stated above, the mass number and atomic number of the product Q respectively, are:
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A thin spherical shell is charged by some source. The potential difference between the two points C and P (in V) shown in the figure is: (Take \( \frac{1}{4\pi\varepsilon_0} = 9 \times 10^9 \text{ SI units} \))
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सेतु संतुलन प्राप्त करने वाले सही परिपथ का चयन कीजिए।
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A metallic bar of Young's modulus, \( 0.5 \times 10^{11}\text{ N m}^{-2} \) and coefficient of linear thermal expansion \( 10^{-5}\text{ }^\circ\text{C}^{-1} \), length \( 1\text{ m} \) and area of cross-section \( 10^{-3}\text{ m}^2 \) is heated from \( 0^\circ\text{C} \) to \( 100^\circ\text{C} \) without expansion or bending. The compressive force developed in it is:
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If the plates of a parallel plate capacitor connected to a battery are moved close to each other, then A. the charge stored in it, increases. B. the energy stored in it, decreases. C. its capacitance increases. D. the ratio of charge to its potential remains the same. E. the product of charge and voltage increases. Choose the most appropriate answer from the options given below:
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If \( c \) is the velocity of light in free space, the correct statements about photon among the following are : A. The energy of a photon is \( E = h\nu \). B. The velocity of a photon is \( c \). C. The momentum of a photon, \( p = \frac{h\nu}{c} \). D. In a photon-electron collision, both total energy and total momentum are conserved. E. Photon possesses positive charge. Choose the correct answer from the options given below :
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Match List-I with List-II. List-I (Material) A. Diamagnetic B. Ferromagnetic C. Paramagnetic D. Non-magnetic List-II (Susceptibility (\( \chi \))) I. \( \chi = 0 \) II. \( 0 > \chi \ge -1 \) III. \( \chi \gg 1 \) IV. \( 0 < \chi < \varepsilon \) (a small positive number) Choose the correct answer from the options given below:
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A particle moving with uniform speed in a circular path maintains:
Read answer →Physics · PYQ NEET UG 2024
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The potential \( (V) \) at any axial point, at 2 m distance \( (r) \) from the centre of the dipole of dipole moment vector \( \vec{P} \) of magnitude, \( 4 \times 10^{-6} \text{ C m} \), is \( \pm 9 \times 10^3 \text{ V} \). (Take \( \frac{1}{4\pi\varepsilon_0} = 9 \times 10^9 \text{ SI units} \)) Reason R: \( V = \pm \frac{2P}{4\pi\varepsilon_0 r^2} \), where \( r \) is the distance of any axial point, situated at 2 m from the centre of the dipole. In the light of the above statements, choose the correct answer from the options given below:
Read answer →Physics · PYQ NEET UG 2024
A bob is whirled in a horizontal plane by means of a string with an initial speed of \( \omega\text{ rpm} \). The tension in the string is \( T \). If speed becomes \( 2\omega \) while keeping the same radius, the tension in the string becomes :
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At any instant of time \( t \), the displacement of any particle is given by \( 2t - 1 \) (SI unit) under the influence of force of \( 5\text{ N} \). The value of instantaneous power is (in SI unit):
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